public class 账号 {
    private int id;
    private String user;
    private String password;

    public 账号(int id, String user, String password) {
        this.id = id;
        this.user = user;
        this.password = password;
    }

    public void display() {
        System.out.println("id:" + this.id + ";user:" + this.user + ";password:" + this.password);
    }
}

class TestUser {
    public static void main(String[] args) {
        账号 user = new 账号(1234567890, "张三", "qwertyuiop");
        user.display();
    }
}